get only one field from a cell in matlab

To get only one field from a cell in MATLAB, you can use curly braces {} with the name of the cell and the index of the element you want to access. For example, let's say you have a cell my_cell containing several elements, and each element is a struct with a field named my_field. To get the value of the my_field field from the first element of the cell, you can do:

main.m
my_cell = {struct('my_field', 'value1'), struct('my_field', 'value2')};
my_field_value = my_cell{1}.my_field;
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In this example, my_field_value will be 'value1'. Here, we first create a cell my_cell containing two elements, which are both structs with a single field my_field. Then, we use curly braces {} to access the first element of my_cell, which is itself a struct. Finally, we use dot notation to access the my_field field of the struct, which gives us the value 'value1'.

Note that curly braces {} are used for indexing into cells, while parentheses () are used for indexing into arrays. If you have a struct array instead of a cell array, you can also use parentheses to access a particular field of an element. For example:

main.m
my_struct_array = struct('my_field', {'value1', 'value2'});
my_field_value = my_struct_array(1).my_field;
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Here, my_field_value will be 'value1'.